Chair-iron.



C. I. TRAVERS.

CHAIR IRON.

APPLICATION FILED AUG.4. 1917.

1,263,156o PatendApr. 16.1918.

2 SHEETS-sain 1.

1- 'uns' l A I Eig] 'iinirnn sinrns Param onirica.

CHARLES J'. TRAVERS, OF PORT WASHINGTON, WISCONSIN, ASSIGNOR TO GILSONMANUFACTURING CO., A CORPORATION 0F WISCONSIN.

' CHAIR-IRON.

To all whom t may concern:

Be it known that I, CHARLES J. TRAVERS, a citizen of the United States,residing at Port Washington, in the county of Ozaukee and State ofWisconsin, have invented a new and useful Chair-Iron, of which thefollowing is a specification.

This invention relates to improvements in chair-lrons employed inrevolving chairs,

and the objects and advantages of the invention will hereinafter appearand be particularly pointed out in the claims.

Referring to the drawings:

Figure 1 is a vertical longitudinal sectional view of a chair-ironembodying my invention, the legs being broken awa Fig. 2 is a horizontalsectional view of the same, the section being taken on the line 2 2 ofFig. 1 looking in the direction of the arrows;

Fig. 3 is a detail in plan of the bottom leg-plate.

Similar numerals of reference indicate .similar parts in all the figuresof the drawings. v

In the typication of my invention as illustrated in the drawings, 1,designates the hub of the iron, and the same may be externallycylindrical, as herein shown, or of any other shape desired. This hub ispreferably of cast-metal, as is usual, and provided with a centrallongitudinal bore 2, extending throughout the same, and terminates atits upper end in an annular iiange 3, at one point of the edge of whichis integrally formed a short vertical standard 4f, transverselyperforated and threaded, as at 5, for a stop-screw 6, the inner end ofwlich extends inwardly beyond the standar At diametrically oppositepoints, the hub may be formed with integrally formed radial studs 7, thesame being located at the points at which the inner ends of the legsI ofthe chair abut and between upper and lower annular bosses, 8 and9,'respectively formed on the exterior of the hub.

Mounted to revolve within the bore 2 of the hub, is the usualadjusting-standard or screw 10, provided with the usual longitudinalgroove 11, which in this instance, eX- tends from the upper end of thescrew to a point near the lower end thereof. The lower end. of thevscrew is preferably left plain or unthreaded, as at 12so that in re-Specification of Letters Patent.

Patented Apr. 16, 1918.

Application led August 4, 1917. Serial No. 184,395.

volving it will not have a tendency to cut the'interior of the bore 2.Also, by terminatlng the slot or groove 11 above the lower end of thescrew, the hand-wheel and what is generally termed the J-washer, cannotWork from their positions on the screw during shipment.

. Fitting the boss 8 of the hub and posiy tloned immediately below theannular flange 3 of the same, is the upper leg-plate 13, Which ispreferably of concavo-conveX form and provided with screw-holes 14,coincident with the legs of the chair-base.

Fitting the lower boss 9, is the lower legplate 15, (see Fig. 3), andthe same consists of an annular central ring 16, and radial arms 17corresponding with the position and curvature of the undersides of thelegs. y

18 designates the wooden legs, there being the usual number-fourand saidlegs are of the usual design. In this instance, the inner ends of thelegs are slightly curved, so as to conform to the exterior of the hub,but in any instance may be changed to agree therewith, and they arefurther provided with -pairs of shallow cavities 19, (see dotted linesFig. V2) to receive the studs 7. It will be obvious that the studs maybe omitted, if desired, and also the openings orV cavities 19 forreceiving' them, and also that any other form of projectiondesired maybe formed on the hub and correspondingly shaped cavities formed in theends of the legs.

The corners of the legs are preferably cut away, as at 20, and betweeneach pair of legs is positioned a somewhat triangularly shapedfiller-block 21, the inner edge of which is formed with an angulareXtension 22, adapted to snugly fit between the cut away portions 2O ofthe adjacent legs and abut against the two bosses 8 and 9 inthe samemanner as do the inner ends of the legs. Thus, it will be seen, that thelegs and blocks combine to complete the circle l cav- CSI

of the arms 17 of the lower leg-plate, each tongue being preferablyVierforated or provided with a screw-hole 9A. Between the arms 1'?, theannular portion of the lower leg-plate may be provided with a nailhole25.

The undersides of the legs 18, are provided with shallow cavities 26,having abrupt shoulders 26 at their inner end to receive and engage thefree ends of the tongues 23, the relative positions of the cavities andtongues being such that whenl the latter are within the former the legsare forced snugly against the hub. lWhen thus positioned, it will beseen that the legs are clamped between the upper and lowerlegplates 13and 15, after which screws 27, are inserted vdownwardly through thescrewholes 1d of the upper leg-plate 13, Vand screws 28, are insertedupwardly into the undersides of the legs through the holes 24rof thetongues 23, these means preferably being supplemented by the stud ortenons 7 entering the cavities 19.

After the legs have been positioned land secured the intermediatefiller-blocks are inclined and inserted under lthe concavO-convexedupper leg-plate 13, and subsequently forced upward and inward, thusbringing them into a vertical position and snug lit with the sides ofthe legs 18, lateral move.- ment of the blocks at their upper ends beingprevented by the depending edge of the upper leg-plate engaging` thesaine. Nails 39, (see dotted lines Fig. 2) are then driven upwardlythrough the perforations or nailholes 2.5 in the bottom lleg-plate andinto the filler-blocks, whereby the latter when once positioned areprevented from lateral displacement.

rlihis completes the description of my 1nvention in detail and it onlyremains to mention the fact that` in the present instance, there ismounted on the screw or adjustingstandard 10, immediately above theiiange 3 of the hub 1, the usual 2!" -washer 29, which, by means of aspline 39, that engages the groove 11 of said screw oradjusting-standard, is nonrotatably yet Vslidably mounted upon thelatter. rlhis J-washer is of the well-known construction-its upper sidebeing provided with shallow radial ribs lightly engaging withcorresponding grooves formed in the underside of the hub 31, of theusual hand-wheel 32, the said hub being countersunk on its underside toreceive the washer. To prevent the separation of hub, handwheel andJ-washer, the hub is provided with an external annular flange 33, overwhich engages the beforementioned screw 6. 'The hand-wheel is threadedon the screw or'adjustin -standard, and by rotating the same, it wil beobvious, the hand-wheel being heldidown by .the screwv 6, the screwv` oradjusting-standard will bev fed up' or' down and thus raise or lower thechair, the latter, it being understood, being supported by the usualmeans at the upper end of the screw or adjListing-standard. @n the otherhand, it will be seen that as the occupant revolves the chair, and,consequently the screw or adjusting-standard, the hand-wheel and SI'-washer will revolve together, the latter bearing on the upper side ofthe annular flange 3 of the hub 1. lf desired, antifriction devices ofany well known character kmay be inserted between the underside of theJ- washer and the upper side of the dange 3, such `forming no part of myinvention.

The filler-blocks, it will be observed more particularly by reference toFig. 1 of theV drawing, are greater in length, vertically considered,than are the legs of the chairbase, and, for this reason, when theirbottoms rest upon the lower plate 15, their upper ends will be above thelegs and therefore in engagement with the vdepending ange of the plate13. yl`he flange of the latter, therefore, coacts with the nails 39 toretain the filler-blocks in position, the flange obstructing any lateralmovement of the blocks when they are once positioned.

Having described my invention, what I claim is:

1. 1n a chair-iron, the combination with a 95 bored hub, and legsradiating therefrom, of upper and lower plates exterior of the hub andbetween which the legs are located and secured, the upper plate being ofconcavoconvex shape in cross section, and illerblocks located betweenthe legs and having their upper ends engaging the depending edge of theupper plate.

2. 1n chair-iron, the combination with a bored hub, and legs radiatingtherefrom, of upper and lower plates located upon the hub Vand embracingthe legs at their upper and lower sides, the upper plate having adepending flange, means for securing the legs between the plates, andfiller-blocks positioned between the legs and plates, said blocks havingtheir upper ends extending above the legs and engaging the flanges ofthe upper plate.

. 3. 1n a chair-iron, the combination with 115 a bored hub, and legsradiating therefrom, said legs having their inner ends shaped to conformto and abutting against the hub and their inner vertical cornersbeveled, of upper and lower plates secured upon the hub and embracingthe legs at their upper and lower sides, the upper plate having adepending peripheral inclined liange, means for securing the legsbetween the plates, and fillerblocks positioned between the legs and theplates, said blocks having their inner edges shaped to conform to theinner beveled vertical edges of the legs and having their upperendserten'dinoabove the'll'egs' and their' outer corners' beveledand-engagedby 13( the inclined peripheral flange of the upper peripheralflange, Eller-blocks positioned beplate. tween the legs and plates andhaving their 4. In a chair-iron, the combination with a upper endsengaged by said flange of the bored hub provided at its upper end with aupper plate, and securing means between the 5 radal flange any? belowfighe same wthdradial plates and the legs. l

stu s, and legs aving tleir inner en s provided with holes to receivesaid studs, said CHARLES J' TRAVERS' legs radiating fromthe hub, ofupper and Witnesses: lower plates embracing the upper and lower H. W.Bomans. 10 sides of said legs, thel upper plate having a T. A. BonRNER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

